Install a proper slide, safe and suitable for kids, that happens to end in the laundry room. BTW, build it with the assumption that it will get soaked in disgu

Install a proper slide, safe and suitable for kids, that happens to end in the laundry room. BTW, build it with the assumption that it will get soaked in disgusting things. Drywall isn't strong and isn't really washable. Non-stick coatings are best; metal is OK.